Experimental evaluation of different refrigeration system configurations using CO2-based blends as refrigerants
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Metadades
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comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/146090
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INVESTIGACIONMetadades
Títol
Experimental evaluation of different refrigeration system configurations using CO2-based blends as refrigerantsAutoria
Data de publicació
2023-08Editor
International Institute of Refrigeration (IIR); Institute International du Froid (IIR)ISBN
9782362150562Tipus de document
info:eu-repo/semantics/conferenceObjectVersió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
Recently, blends created by mixing CO2 with another fluid with a higher critical temperature are being
considered, to allow subcritical operation at high outdoor temperature, thus increasing the COP. The goal of
this ... [+]
Recently, blends created by mixing CO2 with another fluid with a higher critical temperature are being
considered, to allow subcritical operation at high outdoor temperature, thus increasing the COP. The goal of
this work is to evaluate through an experimental approach the energy performance of the mixture
CO2/R152a. Two compositions, (95/5% and 90/10%) were tested in a single-stage refrigeration plant with and
without an internal heat exchanger, and their performance is compared to that with pure CO2. Several
secondary fluid inlet temperature values at the gas cooler/condenser are considered (20-25-30-35-40°C),
while the inlet temperature of the secondary fluid at the evaporator is maintained at 2.5°C. Using the
investigated mixtures an enhancement of the COP compared to pure CO2 is observed, when the base cycle is
implemented, for temperatures above 25ºC, reaching the largest increment at highest secondary fluid inlet
temperature. Instead, when using the IHX, no improvement in the COP is obtained. [-]
Descripció
Ponència presentada en 26th IIE International Congress of Refrigeration, Paris, august 21-25, 2023
Publicat a
26th IIE International Congress of Refrigeration, Paris, International Institute of Refrigeration (IIR), vol. 2, (2023), ISBN: 9782362150562Entitat finançadora
European Union – “NextGenerationEU” | Ministerio de Ciencia e Innovación | European Union - NextGenerationEU “NextGenerationEU”/PRTR | Ministerio de Ciencia e Innovación | Universitat Jaume I | Ministero dell'Istruzione e del Merito | University of Udine
Codi del projecte o subvenció
INVEST/2022/294 | PID2021-126926OB-C21 | TED2021-130162B-I00 | MGS/2022/15 | UJI-B2021-10 | MCIN/AEI/10.13039/501100011033 | PRIN2017 | 2017KAAECT
Títol del projecte o subvenció
Programa de formación de tecnólogos en técnicas de refrigeración de bajo impacto medioambiental | Sistemas avanzados de refrigeración multietapa para aplicaciones de baja temperatura | Transición de aplicaciones de refrigeración de media potencia a tecnologías de bajo impacto ambiental, rentables y de alta eficiencia energética | Sol·licitud Margarita Salas de Laura Nebot Andrés: mejora de las aplicaciones de refrigeración de media potencia hacia tecnologías de bajo impacto ambiental y de alta eficiencia energética mediante desarrollo de nuevas mezclas de trabajo y ciclos avanzados | Refrigeración por compresión con fraccionamiento: exploración de mezclas e incertidumbre asociada para el desarrollo de una nueva tecnología de bajo impacto ambiental | The energy flexibility of enhanced heat pumps for the next generation of sustainable buildings (FLEXHEAT) | Interdepartmental Research Project ESPeRT
Drets d'accés
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess